The Wimpy Kid returns for his 17th volume.Greg's older brother, Rodrick, has longed to become a rock superstar, and his band, Löded Diper, is starting to generate some heat. At least, that's what Rodrick thinks. Greg is a bit more skeptical about Löded Diper's looming success but is just interested enough to catalog the band's efforts to gain enough notoriety to win the Battle of the Bands as Metallichihuahua, Rodrick's idols, did when they were starting out. Setbacks abound, including late nights, a swindling night club owner, band infighting, and financial struggles, accompanied by an endless parade of diaper jokes and toilet humor. The book will be fine enough for die-hard Wimpy Kid readers, but even the biggest fans of the Heffley clan will find this one doesn't live up to previous series high points. Rodrick has long been the weakest character in the Wimpy Kid canon, a one-dimensional lout who was never developed as well as the other Heffleys or even some tertiary characters. This book is squarely placed upon Rodrick's shoulders, and there just isn't enough there for him to make it pop. The rambling series of misfortunes becomes cumbersome after a while. The book is a swing for the long-running series-an attempt to center a long-neglected character-but unfortunately the effort strikes out.A commendable effort that nevertheless misses the mark. (Graphic/fiction hybrid. 8-12)